Electrically-driven machine for sawing logs, &amp;c.



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MI. W m I PATENTED APR. 19; 1904.

No. 757,626. Y K. KOTTMANN,

ELBGTRIGALLY DRIVEN MACHINE FOR SAWING LOGS, 8m. APPLICATION FILED MAY1, 1903.

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PATENTED APR.19, 19 04.

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K; KOTTMANNQ ELEGTRIGALLY DRIVEN MACHINE FOB. SAWING LOGS, 8&0.

APPLIOATION FILED MAY 1, 1903.

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THE Moan-s PEYERS co, mom-4mm. WASHINGTON, D. c.

PATENTED APR. 19, 1904.

K. KOTTMANN. ELEGTRIUALLY, DRIVEN MACHINE FOR SAWING LOGS, 81:0.

APPLICATION FILED MAY 1, 1903 SHEETS-SHEET 3.

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Patented April 19, 1904.

UNITE STATES PATENT OFFICE.

KASPAR KOTTMANN, or zunicn, SWITZERLAND.

ELEOTRICALLY-DRIVEN MACHINE FOR SAWING LOGS, 80c.

SPECIFICATION forming part of Letters Patent 757,626, dated April 19,1904. Application filed May 1, 1903. Serial No. 155,219. (No model.)

To allwhom, it may concern:

Be it known that I, KASPAR KOTTMANN, engineer, a citizen of the Republicof Switzerland, residing at Zurich, Switzerland, have invented new anduseful Improvements in Electrically-Driven Machines for Sawing Logs andthe Like, of which the following is a specification.

This invention relates to electrically-driven sawing-machinesforbreaking down or cutting up logs and the like into balks,railwaysleepers, &c.

A sawingsmachine constructed according to this invention comprises acarriage, means for guiding same, an electric motor carried by saidcarriage, and a saw driven by the said motor and capable of moving withthe aforesaid carriage for the purpose of being fed along the stationarylog which it is desired to cut up. The means for guiding the carriagemay consist of aportable bar or the like, and means may be provided forfixing'this bar to the log to be cut up, so that the said log can be cutup in the forest.

The accompanying drawings illustrate by way of example a circular-sawmachine constructed in accordance with this invention.

Figure 1 is a side elevation of the machine. Fig. 2 is a verticalcross-section on the line A B of Fig. 1.

tail. The sawing-machine as shown is portable and is designed forbreaking down or cutting up logs in the forest. This machine has a bar 1of I shape in cross-section, Fig. 2, which is intended to be placedlengthwise upon the log 3 which is to be out up and to be fixed thereonby means of spikes 2. The upper part of the bar 1 forms a slideway onwhich is mounted a carriage 4, carrying a plate 6, which can turn on apivot 7. This plate is formed with a slide arranged transversely to thebar and in which is mounted a carriage 5', carrying an electric motor 8.The axle of this motor is parallel to the direction of movement of thecarriage 5, and on it is fixed a circular saw 9. The plate 6 has twolugs or eyes 10, to which can be attached the ends of a chain 11, whichFig. 3 is av plan, and Fig. 4 is a sectional view illustrating a portionof -a de-- passes over chain-sheaves 12 and 14, situated in the samevertical plane. The sheave 12 is mounted in a bearing-bracket 13,fastened at one end of 'the bar 1, while the sheave 14:, which isconstructed as achain-driving pulley,

is mounted on a plate 15, fastened to the other 5 5 that is likewisesituated in said casing and. -that is fixed on a shaft 19, arrangedlaterally Iof and mounted on'the plate 15. The shaft ,19 is adapted tobe connected by means of a clutch 20 25 to a shaft 26, which is mountedlikewise laterally of the plate 15. On this Ishaft26 is fixed aworm-wheel 23, which is contained in a casing 24, fixed to the plate 15.

,This worm-wheel 23 gears with a worm 22, which is driven by an electricmotor 21, ar-

ranged on the plate 15.

The operation of this machine is as follows: The carriage 4, with theelectric motor 8 .and the circular saw 9, is first moved along the bar 1to one end thereof, whereupon the said bar a is placed lengthwise uponthe log to be cut-up in such a manner that the circular saw can act onone end of the log. Then the bar is fixed to the log by means of thespikes 2, and by suitably shifting the carriage 5 the circular saw isset so as to make a cut in accordance with the thickness of the balk tobe cut from the log. Then the two electric motors 8 and 21 are setgoing. The electric motor 8 revolves the circular saw, thereby causingit to cut the wood, while the electric motor 21 produces a movement ofthe carriage along the bar 1 along the length of the log. When thecircular saw'has made a cut of the length of the log, the clutch 20 25and the motors 8 and 21 are thrown out of operation. Then the circularsaw is removed from the shaft of the motor 8 and the ends of the chainare disconnected from the lugs 10. The plate 6 is then turned throughone hundred and eighty de- 'grees on the slide 4: and the circular sawis mounted again on the shaft of the motor 8. Then after the ends of thechain have been connected to the lugs the motors 8 and 21 are set goingagain, the motor 8 producing the cutting action of the circular saw,while the motor 21 causes the carriage 4 to move back along the bar 1along the length of the log. If, as is assumed to be the. case in Fig.2, the thickness of the log to be cut up is so great that the circularsaw is unable to cut through the whole thickness of the log in one cut,the log is first cut from one side, and then-after having removed themachine from the log the log is turned over and is then cut from the0pposite side in the manner just hereinabove described. The log may alsobe cut at right angles to previous cuts.

A sawing-machine according to the present invention may also be used asa stationary saw, in which case the bar is fixed independently of thelog to be out. This may be done, for instance, by fixing the ends of thebar in brickwork or masonry. Instead of spikes any other suitable meansmay be employed for fixing the bar upon the log to be cut.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is.

1. A sawing-machine comprising awbed, means to fasten the same onto thewood to be cut up, a saw, means to rotate the same, means to move itlongitudinally of the bed and means to adjust ittransversely of saidbed, substantially as set forth.

2. A sawing-machine comprising a bed consisting of a single bar, acarriage mounted thereon, an electric motor at one end of the bar,mechanism driven by the motor tofmove the carriage along the bar, anelectricallydriven saw on said carriage and means to adjust the sawtransversely of the carriage, substantially as set forth.

3. In a portable sawmill, a bed comprising a single bar, a carriageslidable along the bar, electrically-driven mechanism on one end of thebar to actuate the carriage and an electric motor having a saw mountedon its shaft, on

said carriage and adjustable transversely thereof, substantially as setforth.

4. In a portable sawmill, a bed comprising an I-beam, a pivoted carriageslidable thereon, an electrically-driven chain to actuate the carriageand an electric motor having a saw fixed on its shaft connected to thecarriage and adjustable transversely thereof, substantially as setforth.

5. In a portable sawmill, a bed comprising an I-beam, a pivoted carriageslidable thereon, an electric motor and speed-reducing mechanism todrive the carriage and fixed to one end of the beam, an electric motorhaving a saw fixed on its shaft, pivoted to the carriage, said motor andsaw adjustable transversely of the carriage, substantially as set forth.

- 6. In a portable sawmill, a single bar, means to secure itlongitudinally of the log to be cut, a carriage slidable along said bar,a plate pivoted to the carriage, an electric motor and a saw mounted onthe plate and revoluble with it, substantially as and for the purposeset forth.

7 In a portable sawmill, a single bar adapted to be spiked to the log tobe out, a carriage movable longitudinally of the bar, an electric motorsecured to one end of the bar to impart movement to the carriage, and anelectric motor having a saw secured to its shaft slidable transverselyof the, plate and carriage, substantially as and for the purpose setforth.

8. In a portable sawmilha single bar adapted to be spiked to the log tobe cut, a carriage, a chain-sheave at one end of the bar and adriving-wheel at the other, an electric-motor Worm geared to thedriving-wheel, and an electric motor, having a saw secured to its shaft,mounted on the carriage and slidable transversely thereon, substantiallyas and for the purposes set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses. V

KASPAR KOTTMANN.

Witnesses:

MORITZ VEITH, A. L'IEBERKNEGHT.

